M631 Precision RTD Simulator
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29
Operation manual
6.5.
Command syntax
The commands described in this chapter can be issued through all buses (RS232/GPIB/LAN/USB).
All commands listed in this chapter are explained in two columns:
KEYWORD and PARAMETERS.
KEYWORD column includes the name of the command. Each command includes one or more
keywords. If a keyword is in brackets ( [ ] ), it is not mandatory. Non-mandatory commands are used
only to achieve compatibility with language standard SCPI.
Capitals designate the abbreviated form of the commands; extended form is written in lowercase.
Command parameters are in brackets (<>); each parameter is separated using a comma. Parameters in
brackets ( [ ] ) are not mandatory. Line ( | ) means “or” and is used to separate several alternative
parameters.
Semicolon ‘;’ is used to separate more commands written on one line.
E.g. :RES 100;:OUTP ON
Terminators:
For GPIB interface each command line must end with <lf>. Response from the device also returns
<lf>. For non GPIB interfaces <cr>, <lf> or <crlf> can be used as terminator. The device returns
<crlf> in this case. The device performs all commands written on one line of the program after it
receives terminator. Without terminator, the program line is not executed.
Description of abbreviations
<DNPD> = Decimal Numeric Program Data, this format is used to express decimal number with or
without the exponent.
<CPD> =
Character Program Data. Usually, it represents a group of alternative character
parameters. E.g. {SERial|GPIB|USB|LAN}.
<SPD> =
String Program Data (quoted string). This type of parameter is similar to CPD, but allows
transmission of more ISO characters.
<BOOL> = Boolean Program Data. This type of parameter has only two states 0 and 1. Parameter can
take form of integer value (0 or 1), or character alias (ON or OFF). Device always returns integer
value (0 or 1).
<UNIT> = unit parameter works in conjunction with DNPD parameter and specifies unit of DNPD
(numeric) value. Unit must be selected from predefined ones. If UNIT part is omitted, default one is
used. Query always returns actual unit.
? =
A flag indicating a request for the value of the parameter specified by the command. No other
parameter than the question mark can be used.
(?) = A flag indicating a request for the parameter specified by the command. This command permits
a value to be set as well as requested.
<cr> =
carriage return. ASCII code 13. This code executes the program line.
<lf> = line feed. ASCII code 10. This code executes the program line.
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